According to a poll of about 1,600+ personnel, Heinz field was voted as worst natural grass field, followed closely by Oakland, Miami and our friends in Chicago. Of the artificial kind, the Metrodome was voted worst field. Of course, the last decade, the Dome has been voted or deemed worse in everything else anyone could vote on. I wonder if they are thinking of a "weather related collapse" category. Of course, I think we are about the only one's still in that category as well.
On the other end of the spectrum, University of Phoenix was voted as best grass and Lucas Oil Field was voted best plasti-grass.
Also, a 69% majority preferred playing on grass the turf.